Observe the simplicity of the two variable mixture problem. It is simpler than the
Mary's Apples problem. It involves only one indented step (subproblem) and a result step. Mary's Apples involves two indented steps (subproblems) and a result step.

To solve problems reliably use the following steps recursively.

STEP 1: Identify what the problem/equation asks for.STEP 2: Respond to the request. Ask "How Would I Find Out?"STEP 3: Substitute the response(s) to obtain the result.

EQUATIONS TALKThis problem solution was developed using SureMath,the problem solving software for the 21st century.